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Date:      Sat, 20 Sep 2014 22:08:59 +0800
From:      Ganbold Tsagaankhuu <ganbold@gmail.com>
To:        Gilles DALMAS <gdalmas@wanadoo.fr>
Cc:        "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>
Subject:   Re: kernel debugger on cubietruck
Message-ID:  <CAGtf9xNnNavZLsSkTEpku187z7cCA%2BtgmXNODa3UQJZ4Kncqcg@mail.gmail.com>
In-Reply-To: <1886035707.11136.1411219513483.JavaMail.www@wwinf1p20>
References:  <568188637.10901.1411218668061.JavaMail.www@wwinf1p20> <CAP=KkTwhRpJRW8jTLCjYRf55RLc-xSi%2BFCEBd5WHpU0hn-bUmQ@mail.gmail.com> <1886035707.11136.1411219513483.JavaMail.www@wwinf1p20>

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On Sat, Sep 20, 2014 at 9:25 PM, Gilles DALMAS <gdalmas@wanadoo.fr> wrote:

> I did not know much about debug kernel, but when I pass the trace command=
,
> I get:
>
> db> trace
> Tracing pid 0 tid 100000 td 0xc08ba870
> db_trace_self() at db_trace_self
>          pc =3D 0xc04eba6c  lr =3D 0xc0232780 (db_hex2dec+0x4d8)
>          sp =3D 0xc08e5750  fp =3D 0xc08e5768
>         r10 =3D 0xc08ba1c4
> db_hex2dec() at db_hex2dec+0x4d8
>          pc =3D 0xc0232780  lr =3D 0xc02320f0 (db_command_loop+0x2fc)
>          sp =3D 0xc08e5770  fp =3D 0xc08e5810
>          r4 =3D 0x00000000  r5 =3D 0x00000000
>          r6 =3D 0x00000063
> db_command_loop() at db_command_loop+0x2fc
>          pc =3D 0xc02320f0  lr =3D 0xc0231e54 (db_command_loop+0x60)
>          sp =3D 0xc08e5818  fp =3D 0xc08e5828
>          r4 =3D 0xc0528609  r5 =3D 0xc0540c1c
>          r6 =3D 0xc08ba1b0  r7 =3D 0xc08e5a48
>          r8 =3D 0x00000001  r9 =3D 0xc05d2918
>         r10 =3D 0xc0615aa4
> db_command_loop() at db_command_loop+0x60
>          pc =3D 0xc0231e54  lr =3D 0xc023481c (X_db_symbol_values+0x250)
>          sp =3D 0xc08e5830  fp =3D 0xc08e5950
>          r4 =3D 0x00000000  r5 =3D 0xc08ba1bc
>          r6 =3D 0xc0615ac8
> X_db_symbol_values() at X_db_symbol_values+0x250
>          pc =3D 0xc023481c  lr =3D 0xc0352c88 (kdb_trap+0x15c)
>          sp =3D 0xc08e5958  fp =3D 0xc08e5978
>          r4 =3D 0x00000000  r5 =3D 0x00000005
>          r6 =3D 0xc0615ac8  r7 =3D 0xc08e5a48
> kdb_trap() at kdb_trap+0x15c
>          pc =3D 0xc0352c88  lr =3D 0xc050138c (data_abort_handler+0x680)
>          sp =3D 0xc08e5980  fp =3D 0xc08e5998
>          r4 =3D 0xc08e5a48  r5 =3D 0x00000005
>          r6 =3D 0x600001d3  r7 =3D 0x00000000
>          r8 =3D 0x00000013  r9 =3D 0xc08e5a48
>         r10 =3D 0x00000001
> data_abort_handler() at data_abort_handler+0x680
>          pc =3D 0xc050138c  lr =3D 0xc0501134 (data_abort_handler+0x428)
>          sp =3D 0xc08e59a0  fp =3D 0xc08e5a40
>          r4 =3D 0xc08e5eb0  r5 =3D 0xc08ba870
>          r6 =3D 0xc08ba548  r7 =3D 0x00000005
> data_abort_handler() at data_abort_handler+0x428
>          pc =3D 0xc0501134  lr =3D 0xc04ed754 (exception_exit)
>          sp =3D 0xc08e5a48  fp =3D 0xc08e5ab0
>          r4 =3D 0xc3b49f00  r5 =3D 0xc3b4a080
>          r6 =3D 0xc3b4a0b8  r7 =3D 0x00000000
>          r8 =3D 0xc056b038  r9 =3D 0xc3ae1700
>         r10 =3D 0xc05d4930
> exception_exit() at exception_exit
>          pc =3D 0xc04ed754  lr =3D 0xc024e0f0 (mii_phy_flowstatus+0x2080)
>          sp =3D 0xc08e5a98  fp =3D 0xc08e5ab0
>          r0 =3D 0x00000000  r1 =3D 0xc0547c85
>          r2 =3D 0x00000072  r3 =3D 0x00000008
>          r4 =3D 0xc3b49f00  r5 =3D 0xc3b4a080
>          r6 =3D 0xc3b4a0b8  r7 =3D 0x00000000
>          r8 =3D 0xc056b038  r9 =3D 0xc3ae1700
>         r10 =3D 0xc05d4930 r12 =3D 0x00000000
> strcmp() at strcmp+0x4
>          pc =3D 0xc03d7604  lr =3D 0xc024e0f0 (mii_phy_flowstatus+0x2080)
>          sp =3D 0xc08e5a98  fp =3D 0xc08e5ab0
> Unwind failure (no registers changed)
>

Please try without emac driver. MII in Cubietruck could be different.

Ganbold




>
>
>
>
>
> > Message du 20/09/14 15:13
> > De : "Boris Astardzhiev"
> > A : "Gilles DALMAS"
> > Copie =C3=A0 : freebsd-arm@freebsd.org
> > Objet : Re: kernel debugger on cubietruck
> >
> >
> > Hi,
>
> > As far as I see strcmp() is passed a NULL pointer, try issuing a
> backtrace to get the exact place of calling.
>
> > Regards
>
> On Sep 20, 2014 4:11 PM, "Gilles DALMAS"  wrote:
>
> hi,
> >
> >
> >
> > I would compile freebsd for it run on a cubietruck. For this I used the
> wiki page: https://wiki.freebsd.org/FreeBSD/arm/Cubieboard using option
> confifuration "CUBIEBOARD2." everything goes well, but starting on the
> "truck", I get this message:
> >
> >
> >
> > vm_fault(0xc08bab80, 0, 1, 0) -> 1
> > Fatal kernel mode data abort: 'Translation Fault (S)'
> > trapframe: 0xc08e5a48
> > FSR=3D00000005, FAR=3D00000000, spsr=3Da00001d3
> > r0 =3D00000000, r1 =3Dc0547c85, r2 =3D00000072, r3 =3D00000008
> > r4 =3Dc3b49f00, r5 =3Dc3b4a080, r6 =3Dc3b4a0b8, r7 =3D00000000
> > r8 =3Dc056b038, r9 =3Dc3ae1700, r10=3Dc05d4930, r11=3Dc08e5ab0
> > r12=3D00000000, ssp=3Dc08e5a98, slr=3Dc024e0f0, pc =3Dc03d7604
> >
> > [ thread pid 0 tid 100000 ]
> > Stopped at      strcmp+0x4:     ldrb    r3, [r0]
> >
> >
> >
> > where is the problem please ?
> >
> > _______________________________________________
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>
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